1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045c5b67e56adf5a1c51c956b11647f7f6152cc9de0fe63d8055b9afcb77c0b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/845b15af-a661-4ab7-8454-97b977843714.json and https://artists.proofprofile.net/proofs/artist/845b15af-a661-4ab7-8454-97b977843714.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aa9dd40e54e746126d083ce86cfb27f23662662262bc3c1efc60b40ea939f4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQZ01300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b534fe5730050a35a2f60a8485b95e370fdcedfc75afd3353add269bc2af596. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ031600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6a63e0de83531411df9cdded693ac25beade3a7f727eba7d92f924bf1faefd. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/IT1O01800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca12bdb0210e790750da58775e8fe824d924644330f553aaa926870e02c581c7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITSAK2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7faa3d47212d55539ba7a9bd8719994732ee3f3403c1dfdcb1713c3ef7f7a4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:32:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITSAK2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d76b1515857a1c90043bb943e8b98ce1e70bd874b83c39924fe577e7eecbfe7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITM382300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775da6b275ea9eaeb1f6c1ef8ea29a990b8afcea1a76abf94610dd019ae5699d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ031600120.